Alphabet
upside down A
$\forall$
\forall
The symbol consists of an upside-down "A".
upside down E
$\exists$
\exists
The symbol consists of an upside-down "E".
upside down F
$\Finv$
\Finv
The symbol consists of an upside-down "F".
h bar
$\hbar$
\hbar
The symbol is a combination of the letter "h" and a bar. It is sometimes used to represent the reduced Planck constant, also known as the Dirac constant.
dotless i
$\imath$
\imath
"i" without a above dot.
dotless j
$\jmath$
\jmath
"j" without a above dot.
blackboard bold k
$\Bbbk$
\Bbbk
It is "k" in blackboard bold.
handwriting-style l
$\ell$
\ell
It is the cursive letter "l".
circled R
$\circledR$
\circledR
It is a symbol consisting of the letter "R" inside a circle.
circled S
$\circledS$
\circledS
It is a symbol consisting of the letter "S" inside a circle.